Cell cycle is regulated by the activation or inactivation of cyclin.

What is the purpose of the intake/exhaust valves in a diesel engine ________．

A.They regulate the combustion cycle

B.They supply cooling water

C.They synchronize the ignition spark

D.They supply and regulate the lubricant flow

细胞周期特异性药物(cell cycle specific agents)

细胞周期(cell cycle)

细胞周期同步化(cell cycle synchronization)

细胞周期检验点(cell cycle checkpoint)

A.G1

B.S

C.G2

D.M

A.G1

B.G2

C.S

D.M